@Philbert Thank you. I now have a M5 - in our living room. (Strong signal) in cabinet with router 2' above floor (1) - in Hall way outside office (strong signal in hall and office) 1' above floor (2)...

I have a 840 Sq ft apartment with wood walls and 4 m5 decos. all have up to date firmware and have been installed per instructions. I have 2 dead spots in our unit. How do I fix this.